Beam



March 26, 1929. J. F. HAVEMEYER {BEAM Filed July 1925 INVENTER.

%vwr f fia KW 7711/7 AT ORNEYS.

Patented Mar. 26, 1929.

JOHN F. I-IAVEMEYEB, OF ARDSLEY-ON-HUDSON, NEW YORK.

Application filed July 1,

BEAM.

The present invention relates to structural steel and has for an object to provide improved structural steel forms of greater strength in proportion to the weight thereof.

It has been discovered that the strength of structural steel nicmberssuch as I beams and certain other fornr-ihaving webs can be in creased and at the same time the amount of metal and therefore the weight can be decreased by combining with the webs elements arranged in the manner of a truss, such elements are preferably formed as integral parts of the structural steel shaft by roll-. ing or otherwise but this is not essential.

The nature and objects of the. invention will be better understood from av description 0 iii a. particular illustrative embodiment thereof for the purpose of which description refer-one) should be had to the accompanying drawing fornnng a part hereof and in w hich Figure 1 is a perspective view of an I beam constructed in accordance with and embrulying the principles of the invention,

Figure 2 is a transverse sectional view of the same,

Figure 3 1s a sectional view showing reinforcing ribs sen'ii-circailar in cross sec- 'tion.

An I beam has been selected for particular description as a convenient illustrative form of structural steel.

The beam shown conithin web beam.

The weight of the beam may be reduced by forming apertures in the web d r awi n .etw-ecn the ribs as indicated in the Ordinarily, I beams, channels and other structural steel members of certain types are provided with webs which usually are continuous. certain stresses, including These webs are arranged to take longitudinal shearing, transverse shearing and vertical crushing. The reinforcing ribs are shown 1925. Serial No. 40,718.

as at angles of to the longitudinal axis of the beam and are duplicated on theopposite faces of the web. This arrangement provides a beamwhich better resists bending stresses and, also better resists direct crushing.

If the strength of a section of this beam is considered as regards its strength under a direct crushing load it will be found. that it is considerably stronger because of the ribs.

This will be clear when it is noted in Figure 3.

For the purpose of further illustrating the invention comparative dimensions of a 111Cl1 standard I beam and illustrative inch I beam constructed si x six

in accord anee with the invention and designed to take as great a load as the standard six inch I beam will be given.

The dimensions of the two beams may be for example as follows:

Standard Improved I beam I boom Depth olbemn (5 6. Width of flange 3.5.

r p :11: 0I2:: 0125": Thickness ofreinl'orcingi None 0.3125 Depth of each reinforcing 1. None iiii 0.15ti2" Weight per foot 12.2511)... 11.5711) The iu'ipror'ed beam altlmugh substantially lighter in weight per foot than the standard beau'i will sustain the same load.

The beam shown may be considered from one point of view as in ellect the combination of an I beam with a relatively thin web with a truss structure having upper aiid lower con'ipression and tension members connected by diagonal struts.

In the beam ing with this additional metal of the flanges may be considered as functioning in effect as a truss.

Considering the beam shown from another point view, the provision of the reinforc ing ribs formed integral onthe Web and preferably on both sides thereof and opposite each other makes it possible to reduce the thickness of the web and yet have a beam 'which is sufficiently strong under all the conditions of use. Itwill be noted that the moment of inertia of the beam having the relatively thinweb is substantially the same as a' standard beam having a thicker web so that the strength under a bending stress is not impairedby making the web't'hinne'r.

The thin Web with the reinforcing ribs will provide sufficient strength to resist shearing stresses and will provide suflicient strength to resist crushing stresses. I

The foregolng description of a particular embodiment of the invention is illustrative r the beam to force applied thereto is suggestive merely, it being understood that variationsin the construction may be made without departing from the spirit of the invene I tion as defined in the appended claims.

1. A rolled metal beam combining the characteristics of a standard metal beam and the characteristics of a truss in one integral structure comprising an upper compression member, a lower tension member, a connecting web and reinforcing members arranged to strengthen the web to resist the stresses thereon, the areas of the web sections between reinforcing members being materially less than the total areas between reinforcing members.

2. A rolled metal beam combining the characteristics of a standard metal beam and the characteristics of a truss in one integral structure comprising an upper compression member and a lower tension member with a relatively thin connecting web thickened to provide reinforcing ribs extending diagonally between the tension and compression members, the thin web sections bet-ween reinforcing ribs being perforated.

3. A rolled I beam having relatively large com )ression and tension flanges and a rela- 1 tive y thin connecting web thickened to provide reinforcing ribs extending across the neutral axis thereof to strengthen the web against compression stresses, portions of the thin. web sections between reinforcing ribs being removed.

4. 'A rolled metal beam combining the characteristics of a standard structural steel beam and the characteristics of a truss in one integral structure comprising an upper compression member and a lower tension member with a relatively thin connecting web thickened to provide reinforcing ribs extending diagonally between the tension and compression members, said web being formed with apertures between the ribs to reduce the weight of the beam, the area of said apertures being materially less than the area of the web sections between reinforcing ribs.

In testimony whereof, I have signed my name to this specification this 26th day of June, 1925.

J OHN F. HAVEMEYER. 

